Abstract: A toilet has a toilet bowl and a toilet seat. A hinge structure includes a securing element and an installer. The securing element is fixed to the toilet bowl, and has a head and a screw rod extending from the head. The installer is connected to the toilet seat. The installer has a base with an opening. The opening has a first through hole and a second through hole interconnected with each other. The size of the first through hole is larger than the perimeter size of the head. The size of the second through hole is smaller than the perimeter size of the head. The base first encircles the head with the first through hole. Then, after the base is moved, the screw rod embeds in and fixes to the second through hole.